Effect of fluid drag on low reynolds number discharge of solids from a circular orifice | Zendy

Altenkirch R. A. | Zendy; Eichhorn Roger | Zendy

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Effect of fluid drag on low reynolds number discharge of solids from a circular orifice

Author(s) -

Altenkirch R. A.,

Eichhorn Roger

Publication year - 1981

Publication title -

aiche journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.958

H-Index - 167

eISSN - 1547-5905

pISSN - 0001-1541

DOI - 10.1002/aic.690270409

Subject(s) - body orifice , mechanics , drag , reynolds number , dimensionless quantity , orifice plate , inertia , conical surface , drag coefficient , materials science , chemistry , classical mechanics , physics , mechanical engineering , engineering , composite material , turbulence

A dimensionless solids flowrate for discharge from an orifice in the bottom of a containing vessel is shown to be a function of a parameter that measures the importance of fluid drag to particle inertia. The analysis assumes a linear relation between presure gradient and slip velocity and compares favorably to experiment within its supposed region of applicability for three experimental situations: the self‐induced, air‐impeded discharge of fine particles from a conical hopper; the discharge of particles from a sealed egg‐timer‐like vessel; and the air‐assisted discharge of particles through an orifice.

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